1 files changed, 2 insertions, 0 deletions
diff --git a/errors.ml b/errors.ml
index 8f389ce..3751a60 100755
--- a/errors.ml
+++ b/errors.ml
@@ -4,6 +4,8 @@ exception Undefined of UTF8.t * string list
 
 exception TypeError
 
+exception Cycle
+
 let printf formatter = function
   | Undefined (name, args) -> Format.fprintf formatter
       "There is no function '%s' with signature %a"